Rev: 06-08-16
XR12 SMARTSafe™ Sensor
Severe Duty Magnetoresistive
Sensor for XR125 Encoders,
Fits Shafts up to 7
7/8" [200mm]
Large Bore Hazardous
Duty Encoder Sensor
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• cULus Class I, Div 1 Listed, Groups
A,B,C,D
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• cULus Class I Zone Group IIC
• cULus Class I, Div 2 Listed, Groups
A,B,C,D
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• ATEX IECEx Rated: Zone 1 & 2, 21 &
XR12
XR12 SMARTSafe™ modular incremental quadrature encoder sensors enable the world's
first hazardous duty rotary encoders with removable electronics. They are cULus, ATEX
and IECEx certified and offer incredibly reliable no-bearing construction!
SMARTSafe sensors can be used in ATEX/IECEx gas and dust and UL gas hazardous
environments. Also available: hollow shaft models (XR685), shafted models (XR485), nobearing modular encoders (XR125, XR850), and modular sensors for smaller bore
applications (XR5).
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• Fits Shafts up to 7 7/8" [200mm]
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• Ideal for Oil and Gas Drilling
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• Fully Potted Electronics
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• Up to 8192 PPR
• Wide Sensor-Rotor Gap: No Shimming
or Scraping
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For Level 2 applications requiring ATEX/IECEx Zone 2 or 22 or cULus Class I, Division 2,
Groups A,B,C,D use the XR12 directly in your application, with no barrier, isolator or cable
gland required.
• 3 Year No-Hassle Warranty
For Level 1 applications requiring ATEX/IECEx Zone 1 or 21 protection use the XRB1 or
XRB2 isolator in your control cabinet which permits the use of intrinsically safe wiring
instead of explosion-proof conduit or glands. The XR56 can also be used in UL Class I Div
1 & Zone 0 applications using the XRB2 Isolator.
Unlike the competition, Avtron SMARTSafe encoder systems are protected against short
circuits, power-to-output wiring, and output-to-ground faults.
Instead of mounting a tiny optical encoder with weak bearings on a wobbling stub shaft,
mount XR12 directly on your machine and install the rotor on your main application or motor
shaft. Vibration, shock, liquids, dust and dirt won't harm SMARTSafe™ XR12 encoders!
Paint booths, draw works, coil tubing rigs...XR12 can keep them all working 24-7-365.
Eliminate the biggest cause of industrial encoder failure--eliminate the bearings with XR12
hazardous duty encoder sensors.
OUTLINE DRAWING
MORE XR12 ADVANTAGES
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Sensor PPR can be factory reprogrammed
Full protection against short circuits, reverse voltage, phase-to-phase shorts
Shrugs off dirt, oil, and water contamination
No glass disks to break or optics to fail
Sensor for XR125 encoder
Direct machine-mount capability
Self-Diagnostic LED and Alarm Output
XR12 SPECIFICATIONS
Operating Power: (add cable drive current as req'd)
Level 1 (XRB1): 12-24VDC in, 10.6V out, 150 mA
Level 1 (XRB2): 12-24VDC in/out, 150 mA
Level 2 Protection: 5-24VDC in/out, 150 mA
Output Format: A Quad B with marker (A,A–, B,B–, Z,Z–)
Frequency Range: 0 to 165 KHz
PPR: 8-8192
Speed: 6000 RPM Max. (contact factory for higher speeds)
Maximum Cable Length:
Level 1: Encoder 500' Isolator 1000'
Level 2 (5 to 12 VDC in) 500'
Level 2 (15 to 24 VDC in) 250'
Rotor Positioning: +/-0.100" [+/-2.54mm] movement/misalignment
Sensor-Rotor Gap: 0.045", +0.015/-0.040" [1.14mm+0.38/-1.0]
Temperature: -40°C to 80°C (Storage -40°C to 100°C)
Check out our website for more detailed specifications, drawings, andEnvironmental: Electronics-IP67 (see manual for details)
Vibration: 5-2000Hz, 18G; 100G Shock
installation instructions. www.avtronencoders.com
Weight: 2.2 lbs. [1kg]
Certifications:
Level 1: ATEX/IECEx Zone 1 & Zone 21 Group IIC
Level 1: cULus Class I, Division 1 and Zone 0 Group A,B,C,D*
Level 2: ATEX/IECEx Zone 2 & 22 Group IIC
Level 2: cULus Class I, Division 2 Group A,B,C,D
*See installation drawings for Warnings and Limitations
SELECTION GUIDE